A kind of carbon fiber reinforced ceramic matrix composite material and preparation method thereof

Abstract

The invention discloses a carbon fiber reinforced ceramic matrix composite material and a preparation method thereof, belonging to the technical field of ceramic matrix composite materials; the composite material includes a carbon fiber layer containing a carbon interface phase, a SiC-ZrC matrix on the carbon fiber layer and a SiC The SiC layer on the surface of the ZrC substrate; the preparation method comprises: adopting chemical vapor deposition to deposit pyrolytic carbon in carbon fiber cloth to obtain a carbon fiber layer containing a carbon interface phase; then adopting chemical vapor deposition to deposit the carbon fiber layer on the obtained sample Alternately deposit SiC layers and ZrC layers to obtain a SiC-ZrC matrix, and then use chemical vapor deposition to deposit an SiC layer on the surface of the matrix to obtain the composite material; the carbon fiber reinforced ceramic matrix composite material provided by the invention has high density, and at the same time It has good anti-ablation performance and mechanical properties in low temperature environment, and has broad application prospects in ceramic composite components for high thrust ratio aero-engines.

Description

technical field [0001] The invention belongs to the technical field of ceramic matrix composite materials, in particular to a carbon fiber reinforced ceramic matrix composite material and a preparation method thereof. Background technique [0002] Carbon / silicon carbide (C / SiC) composites have been widely studied due to their low density, high strength, low thermal expansion coefficient, and good high temperature mechanical properties. These properties make them attractive as structural materials in aerospace applications. However, the long-term service temperature of C / SiC composites does not exceed 1650 °C, and the temperature continues to rise, and SiO 2 Film volatilization and active oxidation of SiC are intensified, resulting in a rapid decrease in strength, which hinders the use of C / SiC composites in higher temperature environments. On the other hand, although C / SiC composites overcome the brittleness of single silicon carbide ceramics, the slightly insufficient fra...

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Problems solved by technology

In terms of the selection of interfacial phase materials, although the BN interfacial phase has advantages in some aspects, some researchers have studied SiC / BN / SiC CMCs at moderate (700-900°C) and high-temperature (900-1300°C) temperatures. thermomechanical degradation in different atmospheres, such as oxygen, water vapor, or combustion environments, which concluded that humidity from combustion products and / or humidity in the compression environment of aeroengines promotes the degradation of the BN interfacial phase in SiC-based composites, Thereby reducing the mechanical properties of the composite material

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